Radiator



UCL 20, 1953 I GARRATT 2,656,155

RADIATOR Filed Feb. 16, 1950 FIG-.4. FIGS. FIGB. 657.

lNVENTOR:- Alan Louis Garratt.

I P B WM Attorneys Patented Oct. 20, 1953 RADIATOR Alan Louis Garratt,Kenilworth, England, assignor to The Coventry Motor Fittings CompanyLimited, Coventry, England Application February 16, 1950, Serial No.144,403 In Great Britain June 3, 1949 1 This invention relates toradiators such as are commonly used as part of the liquid cooling systemof internal combustion engines and in particular relates to the headertanks of such radiators and has for its primary object to provide animproved construction and arrangement of joint between the part-s to besoldered.

, The present invention also has as an object to provide'a constructionand arrangement of joint which lends itself for rapid economic anduniform soldering by means of solder fused by high frequency inductionheating.

In the accompanying drawings,

Figure 1 is a diagrammatic plan view of a radiator header tank embodyinga joint according to the present invention and set up for soldering byhigh frequency induction heating to solder the joint.

Figures 2 and 3 are a fragmentary sectional plan view and a crosssectional view respectively of the radiator header tank showing detailsof the joint on an enlarged scale.

Figure 4 is a detail cross sectional view of the joint of the tank aftersoldering and on a still larger scale, whilst Figures 5, 6 and 7 areviews similar to Figure 4 showing alternative constructions of a, jointaccording to this invention prior to soldering.

Throughout the drawings similar parts are designated by the samereference numerals.

In accordance with this invention the base or tube plate 2 of a radiatorblock 3 is formed with an endless marginal groove 4 and the body part ofthe tank to be fitted thereon is provided along its edges with anoutwardly extending endless flange 6, which flange 6 is adapted to bepositioned so as to lie in the bottom of the groove 4 of the tube plate2.

The said flange 6 is shown stepped or cranked outwardly from the sidesof the tank body part 5, the stepped wall portion 1 so formed locatingwith clearance against and over the inner side 8 of the groove 4 in thetube plate 2 when the tank body part 5 is placed in position with theflange 6 thereof in the groove 4 of said plate 2 (see Figures 2, 3 and4) The flange 6 is of flat form and as shown in Figures 3 and 4 is of awidth such that it extends across and against the flat bottom of thegroove 4 for transverse location between the perpendicular sides of thegroove and thus ensures that the stepped portion 1 lies against the sideof the groove 8.

In order to solder the body part 5 to the tube plate 2 the latter isarranged in a, horizontal posi- 2 Claims. (Cl. 257-129) tion and thebody part 5 placed thereon with the flange 6.1ocated in the groove 4 ofthe plate 2. Cold solder in the form of wire 9 is then placed in thegroove 4 on top of the flange 6, the solder wire extending all the wayround the groove 4 so that the ends of said wire 9 abut with one anotherasat 9 in Figure l.

A high frequency induction heating coil ii! connected to a generatorindicated at I! (Figure 1) is then arranged around the perimeter of thetube plate 2 in the same plane thereof (Figure 3) and switched onwhereupon the solder wire 9 fuses and runs between the flange 6 andgroove 4 and also by capillary action between the stepped portion I andinner side 8 of the groove 4 (Figure 4). to efiect soldering of thejoint. It is to be understood that the tube plate 2 must be kept in ahorizontal position during the soldering operation in order to retainthe molten solder in the groove 4.

In addition to reinforcing the edge portion of the tank body part 5 theflange 6 maintains the stepped wall portion 1 against the side 8 of thegroove and counteracts any tendency of the wall portion 1 to buckle whensubject to induction heating.

In the manufacture of radiators the above described soldering of theheader tanks I is effected after the tube plates 2 have been secured tothe tube assembly or block 3.

If desired the flange 6 may be inwardly directed as shown in Figures 6and 7, the joint being then wholly within the tank to give asubstantially flush exterior thereto at the joint, while in either casethe joint may be simplified by omitting the stepped portion 1 as shownin Figures 5 and 6.

Furthermore, the solder may be fused by heating same by other sources ofheat such as, where applicable, by heating the joint in a furnace.

I claim:

1. A radiator for the liquid cooling system of an internal combustionengine, said radiator having upper and lower header tanks connected byradiator tubes, each said header tank comprising a dished body parthaving a continuous substantially vertically disposed wall, incombination with a radiator tube plate in which said tubes are securedby liquid tight joints in such a manner that their bores are incommunication with the interior of said header tank, said body parthaving an endless substantially flat permanent form marginal flangeextending substantially at right angles from its vertical wall at theedge of the latter, and said tube plate having a permanent form endlessmarginal groove of open form bottom of the groove to between theadjacent wall portion of the body part and said perpendicular side ofthe groove so: as to form a liquid tight continuous joint uniting saidbody part to said tube plate.

2. A radiator for the liquid cooling system of an internal combustionengine, said radiator having upper and lower header tank-s connected byradiator tubes, each said header tank comprising a dished body parthaving a continuous substantially vertically disposed wall, incombination with a radiator tube plate in which said tubes are securedby liquid tight jointsin such a manner that their bores are incommunication with the interior of said header tank, the wall of saidbody part having a cranked edge portion from which extends an endlesssubstantially flat permanent form marginal flange substantially at rightangles thereto at the edge of said cranked portion and said tube platehaving a permanent form endless marginal groove of open form having aflat bottom with sides perpendicular thereto and receiving the flatflange and adjacent cranked portion of the wall of said body part, thefiat flange being of a width so that it extends across and against theflat bottom of the groove for transverse location between theperpendicular sides of the latter with said adjacent cranked portion ofthe body part against and over a perpendicular side of the groove, andsolder in said groove extending continuously from between the fiatflange and flat bottom of the groove to between the adjacent crankedportion of the wall of the body part and said perpendicular side of thegroove so as to form a, liquid tight continuous joint uniting said bodypart to said tube plate.

ALAN LOUIS GARRATT.

References Cited in the file of this patent UNITED STATES PATENTS NumberName Date I Re.11,'935 Maconochie Oct. 8, 1901 193,108 Bell July 1'7,187'? 243,232 Fancher June 21, 1881 262,143 Stevenson Aug. 1, 1882901,375 Rigby Oct. 20, 1908 925,201 Lauterbaok June 15, 1909 1,435,384Fleischer Nov. 14, 1922 1,959,464 Dryden May 22, 1934 2,071,583 chuttFeb. 23, 1937 2,184,658 Young Dec. 26, 1939 2,323,985 Fausek July 13,1943 2,506,051 Young May 2, 1950

